Documents / Report
This is Project Blue Book Special Report No. 14, "Analysis of Reports of Unidentified Aerial Objects," Project No. 10073, dated 5 May 1955. The study reduced about 4,000 sighting reports received by the U.S. Air Force between June 1947 and December 1952 to IBM punched cards and analyzed them statistically, including chi square tests comparing knowns with unknowns. It concludes that the reports very probably do not represent technological developments beyond present scientific knowledge, and it notes that no case produced physical evidence.
“R.G.”3 pages
r0e, 0
Evaluation
O-Balloon
1-Astrenomical
2-Aircrafl
3-Light Phenom.
4-Birdj
5-Clouds, Dust, etc
6-lnsuflic Info.
7-PJycholOfical
8-Unknoim
9-Other
Total
\S"Stcoffz>i D* Zest
Number
Certain
/ 3
A.
0
o
0
0
0
/?
Doubtful
0
/o
O
o
0
o
0
a
O
o
/0
Total
a
0
0)
X7
PerCent
Certain
Ja4ll
74
0.0
00
_M
6-0
74-
Doubtful
45
0.0
£0
$0
0.0
40
0.0
37.0
Total
gsi
00
p.o
0.0
fit
74-
/OO.
ye/ir/OA/ 0f x/tftr/zi/c. *£o ex. SLOHJS/
Number
>rtain
0
/
a
/
0
2.
\0
Doubtful
0
/
o
o
0
o
o
o
o
/
Total
ft
(?
/
P
X
P
fO
PerCent
Certain
at
me
0.0
0.0
00
/at
O.C
0.0
p.o
Doubtful
00
0-0
06
P.O
0.0
00
03
0,0
/fiO
Total
50.0
00
0.0
0>,[)
/0.1
0D
0-0
{00.
Number
;ertain
/
0
0
0
a
i
/4
Doubtful
O
I4
o
o
0
0
O
0
o
1
Total
/
/0
0
0
0
0
/
?
,
2.1
Per Cent
Certain
AL
HA.
0.0
0.0
0.0
0.0
/ / - /
Doubtful
00
AM
/to
0,0
00
0.0
0-0
00
00
33.&
Total
¥$
?3%
0-0
0.0
00
0.0
ft
/
//
0
4x
PerCent
Certain
111
131
Jd.
X.4
0.0
0.0
2.¥
0.0
m
Doubtful
0.0
00
0.0
0.0
2,4
0,0
0,0
0.0
00
/ll
Total
rf.3
??.t?
2/4
24
0.0
•7/
2.y
00
/00.
Ovf/t Jo rf/
J/
Doubtful
JT
II
1
0
0
0
0
e>
0
0
/I
Total
i,
Z9
'$
0
0
/0
0
2.1
Z>
7&
Percent
Certain
JJL
1L1
12_
00
0.0
/£*
0.0
21£
71k
Doubtful
&. i>
/4r
/•3
0.0
00
0.0
.0.0
£? cP
224
Total
7.9
/0Z
0.0
0.0
0.0
0.0
27 L
2 6
/00
7 AV1f0 ei//)
Evaluation
O-Balloon
1-Astronomical
2-Aircraft
3-Ligtit Ptienom.
4- Birds
5-Clouds. Dust, etc
6-lnsuffic Into.
7-Psychological
S-UnknoMi
M t h e r
Total
Certain
0f 3/&#r/rt/
£-/0 *L
Number
Certain
0
/
/
0
O
/
0
j -
O
s
Doubtful
O
/4
0
0
0
0
0
0
0
./4
Total
0
/?
,
0
O
0
/
0
$ •
0
IX
Certain
0.0
££.
0.0
0.0
0,0
&£.
320
JZJZ
PerCent
Doubtful
00
0.0
0.0
0-0
0.0
0-0
0.0
_&£.
Total
0.0
47.1
0.0
0.0
0.0
4f
0O
2Z .7
a.0
/0Q.
/{£^*
0
0
4-
0
/ /
Doubtful
O
X
1
0
0
0
0
0
0
J
Total
9
0
0
0
0
0
0
/4
Certain
0.0
,00.0
0.0
0.0
0.0
0.0
0.0
2&i
00
7ti
PerCent
Doubtful
•SH?
7./
0.0
0.0
00
0.0
0.0
(7-0
Total
0.0
%/
0.0
0.0
00
0.0
0.0
/00.
Certain
0
{
a
0
0
0
/
0
4
0
b
/>0i
31- f
Number
Doubtful
O
0
0
0
a
0
0
• t>
0
0
0
Total
O
f
0
0
0
0
/
0
V
0
6
0
Certain
0.0
/t-7
0.0
0-0
0,0
0,0
M-7
0.0
00
/00.C
'erCent
Doubtful
.0.0
0,0
0-0
0.0
0.0
/),0
0.0
-&J0-
0.0-
r£o
Total
0.0
00
0-0
0.0
0.0
ft-7
0.0
66.7
0.0
/00
Evaluation
O-Balloon
1-Astronomical
2-Aircraft
3-Light Ptienom.
4-Birds
J-Clouds, Dust, etc
6-lnsrttic kito.
7-Pr»cfolopcal
S-Unknmn
M t h « r
Total
Number
Certain
/
O
O
a
&
/
0
/
7
Doubtful
£>
1
(«
O
0
0
0
0
a
0
1
Total
/
/
c
(?
0
0
/
0
¥
/4
Pet Cent
Certain
• 2 /
0.0
JUL
0.0
0-0
00
4/
2U
Doubtful
0.0
7-/
ao
0.0
0.0
0,0
•A O^O'.
Total
•r /
0.0
f, /
e.0
Hi
*l
M0,
6 -.10 /4/Afnres
Number
Certain
/
a
0
0
J.
s
Doubtful
a_
3
0
a
0
a
0
O
0
0
3
Total
/
^ /
z
2.
0
2,
0
//
PerCent
Certain
/ii
m.-£L£L
00
&J2-
OJ2-
&£.
J22.
Doubtful
0.0
773
0.0
0,0
00
0-0
00
0.0
0,0
0.0
27.3
Total
/#€
/g.t
Qe
/f.z
ao
/0O.
£>\iee 30 A?,s/vrfs
Number
>rtain
/
/
0
0
a
a
0
3
0
Doubtful
O
O
0
• O
O
e>
0
0
G
0
0
Total
/
/
f
0
0
0
0
0
Per Cent
Certain
/Lf.
0.0
00
0.0
0.0
0.0
Se.e
/00.O
Doubtful
0.0
0.0
0.0
00
00
0.0
0.0
0.0
a-0
00
Total
ft-7
/(t-7
0-0
00
0-0
0-0
0.0
S0.O
0.0
tee.
T^^ncw //or *5h)T?t>
Number
Certain
0
/
0
O
0
a
/
Doubtful
J2?
0
0
c
0
0
0
0
Total
0
4S
?
0
0
0
0
/
3"7
Percent
Certain
JJL
28.1
AS
0.0
0.0
0.0
0.0
7.0
/.s
Doubtful
0.0
414
3JT
<70
0.0
00
0,0
0.0
-0,0
0.0
Total
0.0
5.3
0-0
0.0
0.0
/0.S
0.0
•f.0
/••?
/0O.
223 Report, cited by the archive. The PDF is mirrored here; the original link is above. 309 pages are in the text index: search them above, or from the library's search.